1. Department of Biochemistry, Faculty of Medicine, RWTH Aachen, Pauwelsstrasse 30, D-52074 Aachen, Germany
2. Molecular and Cellular Immunology, Medical Institute of Bioregulation, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka, 812-8582, Japan
3. Department of Immunology, Whitla Medical Building, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, U.K.